Electrodeposited core box



March 3, 1931. A LAUKEL 1,794,858

ELECTRODEPOSITED CORE BOX Filed Dec. 29, 1928 BY 5 v W ATTORNEY PatentedMar. 3, 1931 ARTHUR K.'LAUKEL, or D nnison, MICHIGAN ELECTRODEPOSVIT'EVDcoRE Box Original application filed April 10, 1926, semi No. 101,069,Divided and. this application filed. December 1 29, 1928. SerialNo/329,220. 1 p 1 l 1 The present'application is a division of Ico-pendingv application Serial No. 101,069, filed April 10,1926,-pertaining to a method of making pattern equipment, the working or3 molding surfaces of which are made by elec tro deposition. Althoughthe earlier application illustrates the invention as applied-to acore-box, the invention is ofmore general scope and ,is applicable topattern equipment depressed.andpartlyin relief in the case ofsuch ascopeand drag'plates, match plates andrthe like. The present inventionalso is to beunderstood in this broad sense.

f The invention pertainsmore particularly stated, the molding surfacesare formedby electro deposition upon a cast or impressionr of the-objectto be reproduced. The im: pressedsurface is then madeconductive in anymanner .known in the art, or as disclosed;

in my' co-pending application Serial No. 108,715, filedMay 13, 1926. Ametal face plate is now applied to they margin of the} conductivesurface which isin relief in the case of'a coreeboxand depressed orpartly =some patterns- The deposit which is plated on the conductivesurface obviously adheres V to the face plate 'The inner surfacesof theI face, plate and the deposit.constituteathe 7 working surfaces ofthepattern or core box,

as the case maybe.

i white. metal.

I -,A backing member, preferably of metal, is fitted to the back: of thedeposit and the ad-' joined face plate in such a manneras to provide anintervening spacewhich -is subse.

quently filled with a filling material such as The backing member ifpern'ianently attached .tothe face plate by means ofscrews, inadditionto the filling material, and the parts are finally trimmed atthe marin, whereby the composite structure completed.

The invention is fully disclosed by way of example in thefollowingdescription'and in Figure 1 is a fragmentary plan v ew of moldprepared-for plating;

Figure. 2, s a transverse section thereof, showing also the depositthereon dition the backing plate fitted to the deposit and the faceplate;

Figure 5 is a perspective View ofthe completed structure.

. Reference to these views will; now be made by use of-likecharacterswhich are employed to designate corresponding partsthroughout.

In Figures 1,2 and 3 is illustrated a mold 1 having aformation 2 thereonconstituting a counterpart ofithe object to be reproduced. Thismold'isformed by pouringa substance s-suchasrplaster over the object, which ispre- Figure 8 is a similar-section showing in adviously oiled, allowingthesubstance to set,

and then lifting it from the object. The for mation 2 isin reliefin thecaseof core boxes,

as illustrated, and depressed or partly'; de-

pressed and partlyin relief inthe case of I some patterns; Throughout:the remainder] identifying thesestructures generically as anelement ofpattern equipment.--

-The mold' is treated to resist, deterioration by the electrolyte,andthe surface of the imjpression is made conductive, in any manner knownin the art or as disclosed in my copending application Serial No.108,715 filed May '13, 1926. A- face plate-3 of metal is appliedaroundthe margin of the impression in spacedrelation thereto, and formedwith a bevel edge 4: presented towards the impresslon. The face plate issecuredto the mold l by screws 5 passed upwardlyv throughthe bottom ofthe latter.

The face" plate is v now covered by an insulating sheet 6 glued theretoand is suspended in the bath for the plating operation. 0 After adeposit 7 of suflicient thickness has been formed on the impression2gand in adherence to the bevel edge 4, the mold'is removed from thebath, and the metallic structure thereon is readyfor the backingoperation. e V

Acast metal backing member 8 is built withan inner face 9 generallysimilar tothe surface of the face plate and deposit. On this inner faceare formed ribs which are trimmed or fitted to the metallic structureafter removal of the insulator 6 from the face plate. In this fittedrelation, as shown in Figure 3, the backing 8 andsface plate Baredrilled and dowelled togetherby pins -11.

The backing 8 is now removed .fronrthe face plate, and the metalsurfaces arecleaned with zinc chloride solution to permit adherence Thescrews5 of a molten fillingmetal thereto. I are now withdrawn toreleasethe face plate and p si -froin t eplas e moldhefac plate and deposit arethen tinned; The face plate and deposit are laid on a flat surface,

and the backing member 8 is superimposed thereon in the position shownin figure The fitted relation obtained 1n Figure 3 s restored byre-aligniiig the dowel'holes formerly accommodating the pins 11 and theface plate, as indicated at 18, either through ceive the metal foranchorage. Additional screws may now be driven into the parts to' thesides or throughholes drilled inthe backing member for this purpose. IThe dowel holes are thus filled, but are preferably reopened'and tappedwith continuous threads.

to receive screws 12. The inner-face of the backing member may benotched at 14-to rehold them together if necessary as desired. Allscrews are cut or filedolf perfectly flush with the exposed side of theface plate as shown in Figure 5. Finally, the backing plate and faceplate are trimmed down as faras the outermost rib 15 which becomes amarginal wall enclosing the filling 13.

Although a specific en'ibodiinentof the in vention has been illustratedand described, it

v is to be understood that various alterations in the details ofconstruction may be made without departingfrom the spirit and scope ofthe invention as indicated the appended claims. lVhat I claim is 1. Themethod of making an element of pattern equipment consisting in preparinga mold having an impression or counter part ofsuch element, applying a'face plate to said mold and aroundsaid impression, preparing the moldforelectro deposition, depositing a shell of metal on said impressionconfined within said face plate, fitting aback plate to said face-platein spaced relation thereto, and filling the space between said plates.

2. The method of "making an element of pattern equipment consisting inpreparing a mold having an impression .or counter part of such element,applying a face plate to said mold and around said impression, preparingthe mold for electro deposition, depositing a shell of metal on saidimpression confined within said faceplate, fitting to'thc'face plate anddeposit a back plate having projections thereon, by trimming saidprojections to conform with said face plate and deposit, and fillingthespace between said'plates.

The method of making an element of pattern equipment consisting inpreparing a mold having .a :lmP ESS DQl .cmmte :pa

ofsuch element, applying a face plate to said mold and around saidimpression, preparing the mold forelectro deposition,depositing a shellof metal on said impression confined within-said face plate, fitting aloack plate to said face plate in spaced relation thereto, and fillingthe space between saidfplates with metal.

4. The .method of makingfan elementof pattern equipment consistingiii-preparing a mold having an impression, or counter part of suchelement, applyingaface plate to said mold andaround said impression,preparing v the mold forelectro deposition, depositing a shell of metalon said impression confined within. said face plate, fitting aback-pl'ate to said face plate inspaced relation thereto, re

-moving said face plate and deposit fromthe mold, removing the backplate from the face plate and deposit, *tinning the rough or backsurface of saiddeposit, replaeing'the back plate onsaid face plateanddeposit in their fitted relation, and filling thespace-bctween said backplate and deposit with metal.

' 5 An element of pattern equipment-comprising an electro depositedshe'll formedon an impression or counterpart ofsuoh ele- 1nent, a metalface plate-surroundingthemargin .o'f suchshell in adherence thereto,{aback plate fitted over said 'face plate and secured theretospacedly fromthe face plate and'said. shell, and filling material in the space-hetween the backing plate and the face plate and shell.

6. An element of pattern equipment comprising an electro deposited shellformed on an 'lHlPIQSSlOII 'or counter part of such element,,a metalfaceplate surroundmgflthe'margm of such shell and hav ng an mner beveledI edge to which said shell is deposited, a back plate fitted over saidface plate and secured theretospacedly from the faceplate and saidshell, and filling material in the space between the backing plate andthe face plate and shell.

7. An element of pattern equipment comprising an electro deposited shellformed on an impression or counter part of such element, a metal face.plate surrounding the margin of such shell in adherence thereto, a backplate-fitted over said faceplate and secured thereto spacedly fromthe-face plate and said shell, and metal in the space between thebacking plate and the face plate and shell,

8. An element of pattern equipment com prising an electro depositedshell formed on an impression or counter part of such element, a metalface plate surrounding the margin of such shell and having an innerbeveled edge to Which said shell is deposited, a back plate fitted oversaid face plate and secured thereto spacedly fr0ml&e face plate and saidshell, and metal in the space between the backing plate and tliefaceplaie" s and shell.

In Witness whereof I have hereunto set my hand. I

ARTHUR K. LAUKEL.

